/*
 * Copyright (c) 2010, German Buela
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * The name of German Buela may not be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY GERMAN BUELA "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL GERMAN BUELA BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.gbuela.file

import java.io.{File, FileFilter}

object FileUtil {
	/**
	 * Gets the first filename under a given directory that matches one of the
	 * provided extensions. For files without extension, these can be file name
	 * suffixes. To ensure only extensions are taken, include the dot (as in ".jpg")
	 * Note: the match is case insensitive
	 * @param dir directory
	 * @param extensions array of extensions
	 * @return the absolute path of the first file found matching the criteria wrapped in Some, or None
	 */
    def firstFileWithExtension(dir: File, extensions: Array[String]): Option[String] = {
      val fi = new FileFilter() {
        override def accept(pathname: File): Boolean = {
          val s = pathname.getName.toLowerCase
          extensions exists (s endsWith _)
        }
      }
      val is = dir listFiles fi
      if(is != null && is.length > 0)
        Some(is(0).getAbsolutePath)
      else
        None
    }
}
